I’ve heard that next season they hope to open it up more with Shang-Chi, but I suppose they’d rather introduce a new character in a move than a series that not everyone might watch.
I was sad that Zombie Wanda (Zomda?) didn’t put up more of a fight.
Hot take: Peggy Carter is a MUCH better choice for the Serum than Steve. She already has combat training, is likely stronger as Cap than Steve (if the effects of the Serum are built on existing fitness as I seem to remember) and still has the experience of being left out. I may be swayed by listening to Hayley Atwell having such a ball as CC, though.