Its been quite some time since we saw a new installment in the Metal Slug series, but it sounds like SNK is very slowly moving towards a revival. In an interview with Twinfinite, SNK's Yasuyuki Oda opened up about where discussions on the franchise are right now.
Nothing is decided at the moment, nothing has actually been started, but we’re definitely in the phase where we started talking about “let’s bring it back. We want to bring it back.” The fans want it. On whether we’d do the one-hit kill, there are still a lot of discussions about that, but I like the idea of maybe bringing two modes, perhaps with an easy mode with a life gauge. But there is still a lot of discussion going on internally about that. We want to make sure we do it right.