you guys are more in the know than me but wasn't there a serious split in the CS JC love fest after JC left everyone around him high and dry to take the megabucks on offer at HRT. I was sure I read that by sydney that year he and charlie could not even be in the same room together. I really don't see charlie ( or FPR ) welcoming JC with open arms any time soon.
You can have a serious falling out with someone, and it really doesn't take much to mend the fences to come back to a workable relationship, . . . . . . . . How long it takes for the trust to come back? well your guess would be as good as mine.
Don't get me wrong either, I'm not a hater, Charlie's world must have been falling apart at season'e end, think about it? he would have been planning to buy out relatively cheaply Dick and his family's share of DJR, pumped full of cash from the new sponsor, and with the number 1 on the side of his champion's car ready for the new season, and instead he got turfed out of DJR with a flea in his ear, lost his driver to HRT and the Number one with him and distinctly on the back foot as far as gettign a car on the grid at all. Remember he was already in discussions with FPR for a customer chassis etc by that stage.
Charlie definitely has great people skills, and will attract both sponsors and fans with ease, I'd support him as a second too if he just gets on with it and moves on.