What happened to Optimus after Out of focus

**This will blow your mind because this is covering something that is indeed connected to the show.

During the Aligned Continuity,Hasbro not only made the Transformers Robots in disguise series but made books as well in which both of them are connected. The books also cover some Decepticons that the Autobots captured offscreen/outside of the show but it still is canon. I'm going to talk about what happened to Optimus after the episode Out of focus and as well as Micronus. 

Who is Micronus to begin with? Micronus is one of the Primes and the one who train Optimus Prime in the Realm of the Primes. He's the minicon type of all of the Primes.

Micronus' history:
At the Dawn of time,Primus created Micronus Prime,conscience and moral center of the Thirteen. Although he is the smallest member of this venerated group,he possess boundless reserves of energy and a clever mind,enabling him to predict the actions of his brothers and sisters before even they know what they're going to do.
Micronus' innocent nature belies strong ethical sense,although he takes his role very seriously and approach his duties with a light spark and an easy touch. He eschewed the most dour members of the Thirteen in favor of the free spirited Onyx Prime,whom he once considered his closest friend and his creative energies also inspired him to strike up friendship with Solus Prime and Nexus Prime. His siblings always appreciate his presence-he could impart a fraction of his energy upon them using the Chimera Stone,directing his own energies into a form that suited their needs. He would pass a version of this ability on to his descendants,the minicons.
In recent years,Micronus Prime has retreated to the Realm of the Primes,where he temporarily served as a mentor and spiritual guide to Optimus,the youngest member of the Thirteen. In this role,he prefer to let his younger sibling learn through trial and error,sometimes feigning in a blithe indifference to the mental and physical rigors of his training regimen. In reality,Micronus cares deeply about all living things.

His first true appearance in RID:

Micronus Prime shows up in the episode Out of focus in the series but was it really his first appearance?Yes,it is.
His second actual appearance is during the book,The trials of Optimus Prime. It it set to be after Out of focus and between One of our minicons is missing and Battleground part 1.
During Optimus' training,Micronus became aware that one of the other Primes was interfering with his work. While meeting with the Primes,he realized that Liege Maximo had gone missing and went to confront the culprit himself. Liege Maximo decided to amuse himself by introducing new opponents into Optimus' next training session. 
Micronus allow Optimus to view activities on Earth,where Team Bee is having a game of football with Russell. Once the pair go to resume training,Liege Maximo send a false image of Optimus to Earth,warning Bumblebee of an impending attack. In the Realm of the Primes,Optimus and Micronus are meditating when Liege Maximo send more foes after the former. Micronus is able to dissipate the creations but is puzzled by where they came from.

So yes,this shows a couple more of Optimus' trials in the Realm of the Primes,which is what he spent most of the season doing.
This story also shows that Optimus is able to communicate with Bumblebee and the others by using portals in the Realm of the Primes. It also shows that other Primes are able to do so.
Micronus hints that Optimus may be learning some things from other Primes as well as him before he leaves the Realm.