Are you guys worried at all by the prospect of Alan Taylor directing Thor: The Dark World and the Russo brothers directing Captain America: The Winter Soldier? In both cases I feel a little worried at the prospect of these relatively untried directors taking on sequels to hit movies that I have a real fondness for.
James Gunn at least seems like a logical choice for Guardians of the Galaxy, since his previous work indicates he can handle special effects and action alongside offbeat humour. But Alan Taylor - I can see why his Game of Thrones work might recommend him for Thor, but then again, he's only directed a handful of feature films (though it's worth noting that the same criticisms could have been used against Joss Whedon - and indeed worried me - before The Avengers became a box office phenomenon and the culmination of every comic fan's wet dreams).
The real concern for me are the Russo brothers. CA: TFA was my favourite of the Phase 1 Marvel films, and I'm really worried that hiring a pair of directors best known for TV comedy is shortchanging the Sentinel of Liberty a bit. Cap has to be handled delicately. Joe Johnston was a perfect choice for a period piece like the first movie. But I'm seriously worried that Marvel might fumble the ball in re-introducing our star-spangled hero into the modern world with the choice of the Russo brothers.