Just as a theory tester, I joined a speed game, in which I knew It would end the round.
The rounds do not end and change to the next player etc. they just sit on 00:00:00.
Therefore I would assume time will be added onto all games (24hrs / whatever time has been lost), and speed games will be converted back to a standard game.
This is my assumption at least / the closest you will get to an announcement...