I couldn't figure out why Taskmaster was in the movie originally, as all the other team were also good hand to hand combatants. So TM dying at the beginning didn't actually surprise me.

I like Nebula's frustration when playing the game with Tony on the ship. I also liked Ho Yinsen's meeting Tony in IM3 at the show.

I think they need to think outside the box a bit, why just rely on the hero's? If Doom is such a gigantic threat, why don't the villain's get in on beating him? Could you imagine Hulk & Abomination smashing Doombots? The Master helping to plan his downfall? I've not read any of the comics, so I don't know if any villain's actually do help, but Disney/Marvel definitely need to come up with something new, rather than keeping with the known hero roster.

Well considering there was an Ultron head in the storage building in Spiderman's first movie, I expect another one is found by someone who tinkers with it or it's the usual the military thinks they know better, starts it up thinking they can lock it out and be escapes storyline.