The possibilities are endless. As for what I know about Sagittarius A. Yes it most likely has a black hole at its center. However, it is a dwarf galaxy. That is being assimilated. By the out bar of the Milky Way. From which our planet resides. Or is it Sagittarius D? I get them confused. However, that's the case. Does the black hole of Sagittarius being assimilated," Become. Runaway attractor ? Or will it be drawn to the Milky Ways Center?