I hope Gears 2 and CoD5 have longer campaigns.

[Bodhesatva]

There is practically no way that these franchises will focus on their single player campaigns. They may be slightly longer simply because we can expect increased financial investment, but these games are selling because of their multiplayer.

Or put differently, the extra millions of dollars poured in to these franchises will be largely invested in multiplayer functionality, not single player campaigns.