This acualy cloud happen if Star Trek tos had run on ABC network instead NBC.
TV-program manager were quite mad in that time

and to horror of Roddenberry get a crossover, in exhange for more season of Star Trek tos.
on long term it would change the both franchise deeply
Star Trek get link to future of Batman world and fare future of the Legion of Super-Heroes
20 century Batman -> 23 century Star Trek -> 30/31 centruy the Legion of Super-Heroes
in real world Roddenberry would not very happy with this work "Warp" to this contraption

however the concept of a fare future were men evolve into "higher being" would have be a temptation for him to make a the Legion of Super-Heroes series as successor of Star Trek tos ?
Another change would be that DC comic end up in VIACOM instead of Warner
Because VIACOM hab buy the Star Trek production company and were als intresst in Crossover rights.
what let to buy them DC in 1970
with fan complaning:
Dam that Batman XII movie, this time they realy kill the franchise...
or more horror: now on Nickelodeon: the Stak Trek babys