This meta should be really fun. It's looking like it will be a mixture of the top Pokemon from VGC 2013 and all the megas and new Pokemon that were released this gen. I think Salamence, Metagross, and Mawile are going to be extremely strong megas in this format. I don't think that Kangaskhan is going to stay at the top, since their will be even more intimidate in this meta, and megas like the previously mentioned mence and gross are going to outspeed it and threaten it, while being extremely common.