The redevelopment of Elland Road has been in the pipeline for some time and Leeds United fans may just have got their first clue as to what is in store. Matchday income is a vital revenue stream for Leeds, whose 37,890-capaity stadium generated almost £30m in the last financial year alone. Particularly since the investment arm of the San Francisco 49ers first bought into the West Yorkshire club in 2018, talk of expanding and improving Elland Road has intensified. The 49ers have signalled that this is very much still in their plans after they purchased the Elland Road site back from previous ow…