new
Game
Boy (as i like to call it

) will be following soon, they are part of the same family , third parties could target it easily from the home version using the new devkits,
on the other hand porting from mobile /nGB to home console will be easy too , so they will launched in a very short time probably.
let's say the gap between console and held launches will be no longer than 6 months .
if rumors about home and held sharing same Cpu are true then they could be launching in 3 months period ...and that would be HUGE ... like november to march period.