RAnthony, that is the best idea I have heard since the announcement of the BTTF game!
But I would change just one thing: remove Tycho.
Best social skills? All he ever does is swear at guys, and kill his brother often!
Besides, perhaps it would be wise to use that fourth character slot to "test run" some new first party telltale character to see if he or she gains popularity. If the the test run at the inventory works, he or she could then get their own game.
(Which would incidentally be what Strong Bad would say to the rookie, "Get your own weird game, Dan!")
"There once was a kid named Marty, who attended a game lauching party. TellTale played their part, and made a grand start; They all deserve praises quite hearty.
" - Gumbyfan