When I see the official announcement of all four blokes, then I'll believe it.
For now let's assume Marshall is still a Rockets player, unless he's been seen training with the Pioneers. If he does go to Pioneers, then that's a bonus for them and Rockets will have to find a decent replacement. Under Coach Hill, Marshall will learn a lot, in particular being a team player.
DeWitt was moving back to Mt Gambier so it makes sense he returned to the Pioneers, also I think he had enough of Coach Simons at Forestville. He's got to be one of the best passers and assist guys going round. Great IQ and team first attitude.
Kubank is a machine when on fire so I'd say it's by-by Sturt (formerly Bearcats) and hello again Pioneers. It's a much better fit for him and he will excel under Coach Hill and it will be great for him to get away from Adelaide, train / play full-time and develop his game.
DeSantis, well this guy intrigues me and sort of has come out of the woodwork and blossomed enormously recently - definitely one to watch and where he goes with his basketball. West Bearcats crazy not to keep him and Sturt, well they lost a gem too.
They're all well rounded and bring a lot to Pioneers (if it's true), however DeSantis and Marshall definitely the best shooters among the four.