Just wanted to note these comments from Tom Brevoort in light of my mention of the missing Ron Garney, Alan Davis, and Mike Allred in my Speed Review.

The first is about Age of Ultron and the upcoming Infinity having multiple artists:

I prefer to have a single consistent creative team. But given what we've learned about how much more successful Event series are when they ship more often than once a month, there simply aren't many artists who can work at that speed and still maintain the kind of quality that you'd want. So it's a necessity...

And the second about regular books:

The art matters to us a great deal, the whole package matters to us. But the manner in which the audience likes to consume entertainment is changing--what's come to be known as "binge consuming." That means that we do better if the books ship more often than once a month, and that's an almost impossible schedule for any artist to handle.

There have always been fill-ins. And one good thing about Marvel NOW! is that they acknowledge that there are going to be fill-ins and so they plan for it, dividing the artist switches into arcs (although in the cases of both Uncanny X-Force and Wolverine, those "arcs" are very artificial). But this idea of "binge consuming" sounds a lot more like "get as many books out as possible before the reviews come in" and it doesn't seem like it bodes well for the long term.