The last I heard the only actors not locked up to a long term deal is RDJ and Chris Evans, with the latter wanting to direct. However with other people taking up the Iron Man and Capt America handles in the comics, its not hard to explain in the MCU.
The Disney/Fox talks were leaked this morning, talks are said to have currently stopped. But knowing Disney/Iger if its a deal worth doing they will keep at it. And with the recent Fox issues I wouldn't think its such a bad thing for them to attach themselves to a family brand. However the news division wouldn't be part of the deal as I understand it.
But yes, it would be interesting to see Disney/Marvel doing versions of the Fox/Marvel properties. Having them them back all under one house is something I'm sure Disney has dreamed of and been working towards since buying Marvel.