Just read your reply to someone's question about numbering. Now, I promise, I mean this with as much respect for you as a person, and as a comics pro, possible, but the "#1's boost sales" argument is pretty lame. Yeah, you may have boosted numbers for an issue or two, but it's not new readers. It'll be the same people that dropped the book before the first arc finished, now hoping SOMETHING has changed, only to feel duped and cheated again. Fact is, you're listening to numbers, not fans.
Maybe. But maybe some of them will stick around, and maybe some new people will as well. One thing’s for certain, though: you’ll have made more money and increased the health of the series and its overall profitability for at least that one issue. More is always better than less, and doing nothing is the surest way to the graveyard. You can look at most of the MARVEL NOW! books and see the phenomenon in action clearly (or you could if you had the actual numbers—things may seem more skewed from your perspective without them.)