Sarah Jane Adventures Series Four Confirmed

Yesterday, Russell T Davies, outgoing lead writer of Doctor Who, was interviewed on Who on Who?, a special one-off Doctor Who radio show on BBC Radio Two. Russell confirmed that the Doctor Who spin-off series, The Sarah Jane Adventures, will be returning for a fourth series at some point during 2010. Unfortunately, he did not reveal if Elisabeth Sladen, Thomas Knight, Anjili Mohindra, or Daniel Anthony, will be returning for the series, or if any regular writers or monsters will be coming back. More details regarding the fourth series will be posted here, on The Gallifrey Vortex, when they are made available. What are your thoughts on this?