Tottenham are expected to make an announcement this summer that could be key to securing a £150m-plus windfall. Spurs are the most profitable club in the history of the Premier League and have generated £2.2bn in revenue since moving to their new stadium in 2019. And in that time, commercial income has risen almost as steeply as the cash the North London club generate through the turnstiles. Tottenham generated £228m from sponsorship, merchandise and other commercial sources in 2022-23, the last full season for which financial data is available. They will likely reveal that they have broken th…