No, maybe a few, but most will play it a few days or weeks and than leave again.
The only chance to get those old people interested and than keep em interested is, if the game is really good.

The minimum is obvious, while many old player want gameplay more than eyecandy, this wont work.
While i hope for the best, i still feel, that we will be disappointed. S2 wont be close to STW, surely a lot better looking game, i also bet, that we will have a much better SP-Campagin.
But thats it, the gameplay will be crap and it will be an early beta once again.

3 Months after launch, you will see max 2-4 old clans, maybe not a single one.