Yves, it's too early to tell about sales or the next release. I'd put money on a second season around the end of the year though. In the meantime, check out this existing thread regarding season 2:
I can't imagine that this won't see a season 2 release, but I am not putting my money on 1 coming out before years end. Its not that I don't think its possible, but they've got to do Looney Tunes yet, and other series are going to see some releases, and if you release a lot of these things then you've got some oversaturation in the market place. I kind of expect this will follow the same model as Looney Tunes golden collection.
Well regardless, I hope they don't take too long releasing it. I've already watched season 1 twice already. lol. It's a huge trip down memory lane to watch these shows after so many years. If S2 hits shelves by this Christmas, I'll be ecstatic.