According to wrestlenewz.com, one person close to the situation notes that CM Punk mentioning Colt Cabana, Paul Heyman and Brock Lesnar during his promo on Monday’s RAW has to do with all three of those stars possibly coming back to WWE.
Apparently Punk recently asked for his friend Colt Cabana to be re-hired and put on the main roster, as one of the points in Punk’s new deal if he should re-sign. Regarding Punk staying or going, WWE creative has been told that he’s finishing up at Money in the Bank and most feel that he is still leaving, despite Monday’s promo. WWE still does have an offer on the table to Punk for him to stay.
Heyman and Lesnar have reportedly either made a deal or are at least in very serious negotiations to have a business relationship with WWE. Regarding Lesnar, word is that he won’t be wrestling and won’t be a TV character, should he have a business relationship with WWE again. Heyman would start working with the company again under a deal similar to Lesnar, according to the report by the Wrestling Observer.
EDIT: If Heyman and Lesnar re-sign it would likely be to use their names and likelinesses in games, merchandise, action figures etc. I repeat they will NOT be returning as on air characters