72 sound possible, but some effort. maybe even higher depending on how aggressive they choose to be. And how on schedule they are with their game releases. I am talking horizon bundle, GoW bundle, destiny 2 bundle, COD bundle, SWBF bundle, RDR bundle..... basically, they should do an MS and make a bundle for every major game they release this year. And keep every single bundle at $250. If they can do that then they will hit or pass 72M easy.
70M is a safe bet though.