Just got my Season 5 DVD today.
I'm watching the Commentary on the Episode "Play'n with Fire"
In the episode Jamie Lynn Siegler's character says her Ex Boyfriend is a Charger.
In the Commentary they explain who they hope to be that Charger in Season 6.
Not sure if I say it it would be a spoiler, so here it is in spoiler tags.
I know that probably doesn't excite you all, but it does me, although I was hoping it would be Kaeding.