The Playlist reported that he’ll return in a Silence of the Lambs type situation with Seydoux’s Madeleine visiting him in prison to get information from him about Bond 25’s main villain, played by Rami Malek.
Christoph Waltz has shown his interest in returning to his Bond role on the condition of Daniel Craig also reprising his famed role as well.
Blofeld was kept alive and arrested in his last run-in with Bond and had a major role to play in the franchise’s bigger plot.