Unfortunately not everyone can be Foreman/Couture like, at 38 Tanner needs to step away while he still has some braincells left. Oh and Franklin would absolutely destroy Grove. The only way this happens is if Dana wants Grove out of the UFC. Rich would dominate Kendall worse then Silva dominated Rich the first time around.
I pick Frankin over every fighter at 185 except Silva and maybe Hendo. I would like to see Franklin-Hendo though.