The organisers hope so - they want to do a track marathon every year. Last year's didn't happen because they couldn't find a venue, the year before they used grass 400m track at a school. Whether they use the velo track next year will probably depend on the grant application that has been made to relay the track which might mean it's unavailable. Details will be on their website - Sussex Trail Events. They do a small number of local races, really well organised, small fields and all very friendly - smashing group of blokes that do the work, all runners themselves. Highly recommend their events - in 2016 they are adding another to their 'river' series making 4 marathons, with all the medals interlocking to form one big one - looks great !
Races are the Darkstar (28m up and down the Adur in January), the Arun River run (Littlehampton Marina to Kithurst hill on the SDW and back), the Lunar-Tic in July (Shoreham Tollbridge to Bramber x 3 loops, starts at 8pm so mostly in the dark, brilliant fun) and there is a new one called 'mouth to mouth' which will be Shoreham to Littlehampton and taking in both rivers some of the SDW.
Good luck with the recovery.