River Joint nothing is certain,nothing has been confirmed airline wise,the stands take little to reconfigure money wise,there is nothing in Notams to suggest that this is happening soon.
Get real!,no LCC including Easy are going to put up with constant diversions to BOU due to after 23-00 SOU closure.You need to pull your head out of the clouds and accept that Unless there is changes in the agreement for operational hours at SOU ,airlines are going to be hesitant at best in investing in future operations.Meanwhile BOU has begun under progressive management to increase,be it slowly in destinations.I'm sure as capacity reaches maximum at London's group airport's BOU will benefit.Southend is one of the London airport group and with significant investment has begun developing a good route network,but crucially is open ( with some night restrictions,) 24hr.
This point brings us back to SOU sticking point,that is operational hours,any variation on these will kick up a almighty storm from Southampton and Eastleigh residents.