Now that the Russos have confirmed that the time travel actions created new timelines/parallel universes what do you...

They are all non canon in their own universe.

who wood win betwen peter quill and peter parker

It's inconceivable that it would take her two decades to deal with the Empire when she can obliterate a fleet in minutes.

This is Post-Supreme Intelligence.

Which he wouldn't have, because the Collector would not have it.

But then they all get captured by the Xandarian authorities.

But if it's all alternate timelines, then there is no must be and every choice will just make a new timeline in a sea of them

They're not going to do that. This movie sent off everything from the first 3 phases, I doubt they're even going to do cameos.

If Quill never holds the power stone, Ego never finds out about him and never does his plan. Even if he does, Quill would still fight him when he reveals he killed his mother.

Fools. One and all.

So are there two Steves in that timeline or does that timeline's Steve just stay in ice forever? Wonder how he'd feel about being cucked by himself.

Perhaps that should be a plot: there is a maximum number of timelines and if there's too many, the multiverse starts dying...