Tyrelio

Wasn't sure where else to put this question and I can't seem to find a solid answer anywhere after googling... So ARK is about $75CAD for PS4 right now, if we buy it now do we have to re-purchase the full release in spring at a discount of "50% off the release price" or will we be getting the full spring release free since we bought it now and $75CAD happens to be 50% of what it'll cost come spring? I've been waiting forever to play ARK, but reconsidering if it means it's going to be a $100+ game in the end. Thanks