Ok, so this is the ultimate pie-in-the-sky pipe dream that will likely never happen, but I still want to discuss it.
The rights to most pre-1970 IPC Media comics properties are shared by Time UK (owned by Time Inc) and DC Comics (owned by Warner Bros./Time Warner). I doubt DC would want to sell their share in these properties, but Time isn't doing anything with them AFAIK, so maybe some could buy them out (if not Rebellion, maybe DC could buy out Time's share in these properties).
Likewise, the Dan Dare Corporation owns Dan Dare and most strips featured in The Eagle. Again, I'd like Rebellion to buy them out.