I didn't love Endgame for a variety of reasons, but I am looking forward to seeing Mackie as Cap and, so far, I like his rapport with Sebastian Stan. Marvel needs more levity and these two could provide that. Loki could be a fun ride, as well, because villains are always more fun than heroes. Got the feeling Marvel never expected Hiddleston to become a favorite or make Loki such an endearing villain.
And, of course, all of these Disney Plus asides are a money grab, but I'm interested to see how they build the characters. I'd rather have the serials like this than the three hour overrated blockbusters that just end up one well-choreographed special effect after another and plot lines that even the writers can't keep up with from one movie to the next, much less explain. Even if comics don't really need explanations by nature, I'd appreciate more cohesive plots. But I realize that the beauty is that they can kill and resurrect with impunity and without logic and that's the point of comics. I fully expect RDJ and Evans to miraculously reappear in coming years with little need of a plausible explanation... Tony was biding his time / Steve never liked the past he was just waiting to rescue Nat with some new Pym blah blah blah.