On the Xbox Live Rewards web­site, Microsoft has list­ed release dates for games that have no offi­cial­ly announced release dates. Mass Effect Androm­e­da is list­ed for March 31st, South Park: The Frac­tured But Whole for March 30, and Injus­tice 2 is set for March 28. 

So far only Ed Boon the cre­ative direc­tor of Nether­Realms Stu­dios has com­ment­ed on the leaked release dates. On twit­ter he states that Injus­tice 2 will not come out on March 28.

There are also some incon­sis­ten­cies on rewards pages itself. Every con­firmed release date giv­en is set a day ear­ly such as Res­i­dent Evil 7 being list­ed for Jan 23 when the offi­cial date is Jan 24.

It could be that the dates put forth are place­hold­ers for games con­firmed for ear­ly 2017. There is also the dis­tinct pos­si­bil­i­ty that one or more of these games are pushed out of ear­ly 2017. EA has already stat­ed before that they are will­ing to push back Mass Effect Androm­e­da if need be. It is best to take these release dates with a grain of salt.