I don't think Malwarebytes is really going to go anywhere so I vote no. It's still very effective however in removal testing however, Zemana has impressed me a good bit more so than Malwarebytes does. Not only does Zemana have great removal and multiple engines (more so than even Hitmanpro so in certain situations, it will catch more and remove more), it also has real time. Real time that does take a toll on your system performance while at the same time providing some kind of behavioral (which I haven't had a chance to use so no comment). Malwarebytes real time takes a pretty hefty toll on system performance and it's other feature (web blocking) is far too aggressive.
Just to put it out there, I don't like Zemana due to crowd mentality, it's detection rate, or because I simply don't like Malwarebytes (I do like Malwarebytes products a lot). I've had plenty of time to use each other the tools and Zemana has always outdone Malwarebytes. Now on systems where malware will block you from installing, Malwarebytes would probably be the first one through the door to defend your system. Zemana would be a clean up tool.
Each have their strengths, but Zemana in my eyes is better but could still (as any other product) use more improvements.