I would say that's pretty much in proportion to the fact that it's likely to be the *only* really big crossover across the entire Marvel Universe in this entire decade. It's pretty much *the* crossover from 2000-2009.

So yes, if this were a yearly thing, I'd agree that a 100-issue checklist would be overdoing it, but if it's a decadely thing, I think it's perfectly okay to have one Really Big Thing once a decade.
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