@Vault Boy: I agree with your post. Not to mention that Imévision would not be privatized into TV Azteca. For a public broadcasting buff like me, that would be a good sign.
Apart from that, the possibilities are endless. In my opinion, an interesting possibility is if the state-owned stations undergo massive reform into a full-fledged BBC/CBC-style public broadcaster. For the sake of argument, let's say that the new Mexican public broadcaster adopts a
Public Broadcasting Trust model as well as the German
ARD model (so that state-level public broadcasters are also now involved in the running of both national public radio and national public TV), though allowing for government grants and commercial revenue to be sources of funding. However, as in TTL it would be a public broadcaster, it would have autonomous editorial control from the government (meaning that Cárdenas wouldn't be able to manipulate the news to his liking - nor would the PRI, for that matter).
Both IMER and Imévision would become part of the new Mexican public broadcaster, along with the Department of Public Education's Edusat network and Radio Educación station and the La Red network of state-level broadcasters. Because bureaucrats can be such imaginative at times

rolleyes

, the new public broadcaster would retain the IMER acronym, though now meaning the "Instituto Mexicano de la Radiodifusión" (the Mexican Broadcasting Corporation in popular English translation).
As can be expected, at the national level most services are heavily reorganized to conform to the new public broadcasting structure of IMER. As part of that:
*On the radio side:
- Four of the five Mexico City-based MW stations - XEB, XEEP, XEMP, and XEDTL - as well as all three Mexico City-based FM stations - XHIMER-FM, XHIMR-FM, and XHOF-FM - become anchor stations to new national networks
- These national networks would be Radio México (XEB; similar to BBC Radio 4 or CBC Radio One, particularly vis-à-vis CBC Radio One's regional structure), Radio Ciudadana (XEEP; similar to the old BBC Third Programme whilst continuting its OTL role as an educational radio station), Radio Información (XEMP; similar to OTL Radio Ciudadana and BBC Radio Five Live), and Radio Juventud (XERIN, in OTL XEDTL; essentially similar to its role as Radio Infantil then and taking over OTL XEMP's role and hence similar to BBC Radio 1 and the old BBC Radio 5), plus the existing Opus (XHIMR-FM), Horizonte (XHIMR-FM, though more broadened and similar to BBC Radio 2 or CBC Radio 2) and Láser (XHOF-FM; in OTL Reactor, though now more broadened and somewhat similar to CBC Radio 3) FM stations which are now national.
- Outside of México City (where IMER owns the local radio station) and the national networks, the state broadcasters handle all regional broadcasting and stations owned by IMER in OTL are devolved to the states (with the exception of XERF in Ciudad Acuña, which could be used as a relay station for XERMX-Radio México Internacional, and the stations in Chiapas).
- IMER also makes a substantial investment in international broadcasting, and thus broaden XERMX-Radio México Internacional into a continuous 24-hour service, with international relays where needed (although the Spanish programming does relay domestic programming, which is aimed for the Mexican diaspora), as well as international satellite TV services intended for reception outside México - including the potential to develop a regional al-Jazeera which would rivate OTL's TeleSUR. These could also include Latin American uses of the Edusat network.
*Speaking of which, on the television side:
- A massive reorganization of Imévision's networks is underway, even more so with the decision to extend Canal 22's coverage into a nationwide network.
- As a result, the first step is a name change. OTL's Azteca 13 and Azteca 7, as well as Canal 22, are now IMER Canal 1, IMER Canal 2, and IMER Canal 3, respectively.
- IMER Canal 3 is the easiest to describe - it is essentially similar to PBS in the US, BBC2 and BBC4 in the UK, CBC Bold or artv in Canada, or France 3. As such, it is a cultural and educational network with secondary general entertainment, made up of national programming from México City and regional programming - a higher amount than usual for Mexico, as each IMER Canal 3 station is autonomous and run by the state broadcasters. As such, the IMER Canal 3 stations take on the identity of the state they are located in: i.e. IMER Canal 3 Baja California del Norte (in this case, also airing English-language programming for the benefit of tourists and residents of San Diego and the Imperial Valley), IMER Canal 3 Yucatán, etc. IMER Canal 3 is commercial-free.
- IMER Canal 1 is also somewhat easy to describe. Essentially, as in OTL, it's the flagship station; unlike OTL, what we have are OTL Azteca 13's programming and Azteca 7's programming crammed into one network. As such, in addition to news, current affairs, novelas, variety programmes, and sports (particularly fútbol and lucha libre), it's a general entertainment channel that tries to offer something for everyone, even if it tends to be more "family-friendly" than Televisa. In addition, since in TTL IMER Canal 1 has a public-service remit, there would definitely be some changes in Canal 1's output, particularly in its news coverage and expansion of its programming output to cover areas that Televisa and the OTL TV Azteca would not cover (in one instance, regional news). This actually makes IMER Canal 1 more like TVN Chile than Televisa Canal 2/Canal de las Estrellas.
- That leaves IMER Canal 2, whose mission is different than the OTL Azteca 7. Here, unlike the entertainment-oriented IMER Canal 1 and the arts, education, & regions-oriented IMER Canal 3, IMER Canal 2 is essentially a national terrestrial/FTA version of CNN or C-SPAN in the US, the Documentary Channel, Newsworld (both the original incarnation and its current incarnation as the CBC News Network), and CPAC in Canada, EinsFestival and EinsExtra in Germany, or France 5. Any programming falling outside of this would be variety programming, surplus sports coverage, children's programming, or relays of TV UNAM, and in those cases could be conveniently put off for the weekends.
- Edusat would largely continue on as before, so for the most part no changes there. As stated above, IMER could also have some energy to develop some international and pan-Latin American TV services, including a TeleSUR competitor.
- Oh, and maybe in TTL Mexico becomes a leader in digital technology for broadcast media, and not just in Latin America.

That should cover it, for the OTL state-owned stations. Did I miss anything?