PlayStation Asia has listed the Instant Game Collection for April, listing Mercenary Kings as April’s free PS4 game for subscribers, indicating that the same game could be available in Europe and North America. So far, the PS4 games in the Instant Game Collection has been the same across all regions, so there is a strong possibility of this happening again.
Sony should be announcing the PlayStation Plus line-up for April in Europe and North America any time now, usually a week before new content starts to appear. Hopefully we’ll have confirmation this week from Sony.