WI Otto doesn't die of malaria. What would happen to his dream of reviving the Roman Empire?
This looks like a really interesting PoD, my Deer.
(SCNR)
If Otto would have lived longer, he would certainly have continued to concentrate
on Italy rather than Germany. But it is hard to tell the long-term consquences.
I think it unlikely that a dynasty could have managed to evenly dominate
both parts of the empire. Italy-focussed emperors would probably have caused
waning influence on Northern realms, even to the point when imperial claim
is only nominal. This is what happenened in Italy in the long run.
But of course this would make a difference as the Italian ruler would retain
the by far more prestiguous and respected title.