D.K.
It is hard to predict, my daughters teeth came in at goofy times, not necessarily in the order they were suppose to and she got teeth really early.
If it is truly a molar, for whatever reason it is coming in now. They have an amazing way of working it out those teeth coming in, hee hee.
If you are concerned, call a Pediatric dentist, as he is still too young to really get an exam and just ask.
My daughter has spacing issues and she is 7 but it has more to do with their jawline and if they are petite or not, like she is.
Motrin helped with the molar teething and teething tablets.
Good luck, call a dentist if you have one personally even and just ask.
Not much you can do if it is coming in but wait...hugs!