True. But what would that mean, exactly. At Marvel, we've seen exec statements & things (and heck, financial reports, since it was public!) that comics were a very small part of their big picture. For years now, really. But I can't really say their comics have suffered for it.
What would the problems be of the comics being the small fish in the DC pond? I'm not saying there won't be any, but there could be just as many story effects that some might see as benefits.