I don't agree with this thinking at all. There's not a chance in hell Tyler wants Brett anywhere near F4, and I kinda doubt he wants JC at F6. The alliance will start to splinter before then.
But as I noted upthread, Tyler has way more allies than Brett right now. Sam and KC will never turn on him, Angela is a bit of a wild card but I doubt she will anytime before F3. I won't say Scottie will never take a shot at Tyler but it's a long ways off.