To be honest, I don't see folks running out to their nearest concert ticket office in order to buy tickets to see the brothers, without Michael.
The brothers may be able to do shows along the lines of what Tito is doing now. Tito has little showcases here and there, no fireworks, no huge production. And that works for him.
But I'm sure that is not want Jermaine wants. In my opinion, Jermaine wants the huge "This Is It" type production, with all of the pomp and circumstances that comes with that type of show. And that's why the brothers waited for Michael to join them for so many years. They ALL knew that nobody would back them to that level, unless Michael was involved.
No offense, but I just don't see anybody willing to back the remaining brothers to that extent. I realize that Jermaine wants it badly, but he first needs to face the fact that this is not back in the day, when the Jackson 5 were a big deal, this is 2010 and things are way, WAY different now (and so are the brothers - LOL!)