>>150329619
That had a very simple and easy catchy plot point of "there are brightly colored little MacGufins, and bad guy wants to collect them", there wasn't any further even hint of why or how he was going about this and really it didn't make that much sense looking too closely (having Loki's staff be the mind stone for instance, that's clearly not indicated by the first Avengers movie, in fact it appears to be connected to the tessaract itself, and it makes no sense as to why Thanos would give away the mind stone to a minion if he's collecting them, that meant he started the movies with one stone and wound up with zero stones before Infinity War).
In fact, I heard all these same complaints even with the easy plot of collectable MacGuffins before Infinity War came out, "We don't know anything about Thanos, I don't know why I am supposed to care about him as the villain", etc. Ultimately it was Infinity War that did all the heavy lifting. Now, I don't think it's ideal either, specifically because Doom ought to be a long known quantity to the world at large rather than coming out of nowhere, and his lifelong enmity with Reed should be front and center (hell the precise climax of Secret Wars, which they're adapting, is Reed and Doom's rivalry coming to a head). However, I don't think that it is impossible to introduce a villain in part one of a two part film and make him compelling. It doesn't mean it will happen, but it is not impossible, and Thanos was not that far off this himself, with general audiences.
