It's funny. Any other time and fans would be thrilled and excited as hell at the chance to see Tennant return and interact with Smith's Doctor.
But now we're all just like "eh, whatever. What else you got?" Lol
I can't speak for anyone else, but I am pretty excited to see Tennant return and interact with Smith. I am pretty disappointed we aren't at least getting someone else from the old show, but I'll live.