I think it's only natural that, as with any franchise, there will be ups and downs in certain forms of media and merchandise over the years. Look at Spider-Man. He's hugely successful but still had an animated series on MTV that fizzled out pretty quickly and it seems like they're always cancelling comics and relaunching others.
With Buffy, I think we're in a bit of a transition period right now. We're at the end of the "Buffy as a television series" period and we're seeing the end of some things that were launched during that period. The fact that the Buffy magazine was still going this many years after the show was cancelled is testament to just how popular the series still is.
As far as the action figures getting cancelled, I can't say it's necessarily a bad thing. The designs and sculpts on some of those things are horrendous and in my opinion, they look pretty cheap. I wouldn't be surpised if you see another company pick up the license and relaunch with better sales.
The success of the comic brings me to the "post TV series" life of Buffy which is just finally starting to take it's own form. If there's money to be made, and clearly the success of the comic proves that there is nice amount of money left in this franchise, studios and executives will be interested in cashing in.
Buffy animated is sitting quietly in the wings with a short proof of concept clip. I wouldn't be surprised to hear of that one again.
I agree. Whereas the Buffy of the past was centered around the original TV series, I think the new direction of Buffy will exist on several fronts. The comics have started things off and I think an animated series takes care of a lot of the problems they might run into on TV. They don't necessarily have to get the original actors if they can get someone who sounds close enough to the original.
They also don't have to worry about the actors aging, which means they could make a show about the characters while they were still in high school if they wanted to. (This also takes care of the problem of having to balance continuity with the season 8 comic)
Outside of the comics and potential animated series, we've got Ripper coming up and I think we might still see a few other TV/direct to DVD movies or possibly a mini series.
Now I'm not suggesting that they whore out the Buffy name on just anything but Joss has always said he created Buffy to be a cultural icon. I think the possibilites I've outlined are just an extension of that.