Hi,
We looked at a few franchise options back in 2003, we checked out KFC and Subway, but decided against it, then they began to open in 2004, oh well!. From my experience, there is no reason we couldn't get a Taco Bell in Marbella, the franchise programme is managed by the same company as KFC.
In terms of Starbucks, I was told that they don't actually franchise, and they own all their own stores, so unless they start to read YourMarbella.com and see you guys would like one to open, it's pretty unlikely to happen.
Didn't someone take on the Taco Bell franchise for London a few years ago, but it wasn't run very well and it closed really quickly? I love Taco Bell and would love to see one in Marbella, and every town in Europe! And a Wendy's, In N Out Burger, Cheesecake Factory, Carls Jr, Del Taco etc etc!