Hulking is probably gonna be skar, or whatever hulks sons name is. I know it's not the real hulkling but it's the replacement version, ya know what I mean?
It's definitely possible. They're mixing a few things together sometimes in the MCU
Ego is now a celestial
Sylvie is a combination of Loki and Enchantress
He Who Remains is now a Kang variant
Probably some other things that I can't think of right now