Glory 21 has officially been announced for May 8th at the Valley View Casino Center in San Diego. Wikipedia tells us that the arena holds 16, 100 people for mixed martial arts events if the whole arena is used, so this could be a huge show.
Artem Levin will be defending his title against the winner of the tournament at Glory 20 in Dubai. So it could be Jason Wilnis, Alex Pereira, Wayne Barrett or Simon Marcus anyone one of them against Levin will be an exciting fight as they all bring something different to the ring.
There is also an all American heavyweight tournament which will grant the winner entry into the Glory heavyweight contender tournament where the winner will fight Rico Verhoeven for the belt. The American heavyweights have yet to be announced.
Of course this will all be Live on Spike TV on Friday, May 8th. I'm so happy to see Glory announcing events more than a month before the show now and giving us all a chance to get excited and also more time to buy tickets. [source]