WizKids will release Marvel HeroClix: X-Men--Days of Future Past on April 23, 2014, just before the May 23, 2014 theatrical release of the film of the same name (see "'X-Men: Days of Future Past' Wraps Shooting”).  Two SKUs, a Gravity Feed and Sentinel Packs, are planned, with figures from the decades-spanning story that began in Uncanny X-Men #141. 
Figures in the single-figure packs in the Gravity Feed will include past and future X-Men plus supporting characters from the Brotherhood of Mutants and elsewhere at $2.99 per pack.
The Marvel HeroClix: X-Men--Days of Future Past Sentinel Pack features a Sentinel figure (described as "several inches tall," with a new metallic paint job) that towers over regular size HeroClix.  It will come with two dials (one for offense, one for defense) as well as 48 horde tokens and two maps for use in the game.   The figures will retail individually for $29.99 and come six to a case.  Aficionados will have to compare this new figure to specs from the movie (see "Sentinel Blueprint From 'X-Men: Days of Future Past'").