This is an alternative universe where the Primes are reborn after death, and Optimus has to take care of them.

Optimus sat there patiently with B-127 as the sacks of eggs started hatching and out came the sparklings. Optimus could recognise each Prime just by one simple glance. Now it was his job to take care of them. Let's just say taking care of 13 babies is going to be a challenge...