Something tells me the ramifications of Secret Invasion will be felt for a while, which might not be a bad thing.
For a while meaning up to a year until the next superevent.. what did we feel from House of M? Couple of 2nd and 3rd tiers de-mutated but the main cast is fine.
Civil War? About the only thing still lasting is Steve Rogers being dad and Bucky taking over the uniform.
Face it.. as long as it sells Marvel and DC aregoing to milk everything out of their books. If crap storytelling but shiny pictures sell they'll do that and from what i hear at least Marvel is doing fine with their mega-events so expect them to do it on a routine basis.