The previous reboot/continuation of the "Terminator" series made sense to a certain point, even though they really didn't know what direction to take in the end. If that was with a new character or simply following a John Connor future arc.
"Genisys" seems like the "Robocop" remake edition. Putting in more effects, robot action and throwing back Arnie into the mix. In order for people to flock to the theaters and to easily spend their money on mindless action.
Will this lead to a powerful return for the Terminator franchise? I think not. Their grasping at straws ever since "T3" and it ain't going to get any better this time around.