Help deciding who to upgrade

Hdanny2178

All champions are 5 star,I’m new to the game and could use a little help. Here are my choices…
Captain America
Spider-man stealth
Warlock
Annihilus
Punisher 2099

JLordVileJ

Stealth has the most damage but warlock helps a lot in act 5 and 6 questing

_puy000_

Safe your resources for the banquet event.

Hdanny2178

When does the banquet event start?

_puy000_

The 20th I believe