Bob Plaza will be a World on Nexus Adventures. It is a world based on Starbase 3001 and Club Alpha, it is an evergreen (doesn't contain enemies) world with Matt as commander. It can be reached from Imagination Gardens.
It also house the entrance to The Nexus Core minigame. From here you can join a faction after completeing your initiation into the Nexus Force , you can do this by completing a mission for the Nexus Guy in Nexus HQ after which you can travel to any of the Worlds in LNA.
As you enter this amazing station you meet the memorial statue to Bob .