I have just answeared similar theme on different question, so basically yes, Sarada and basically anyone can manifest rinnegan, here is the explaination:
Okay, let me introduce my personal opinion on this: Otsutsuki have gained the power of charka, which made them manifest the origin chakra eye technique. But as the time went by, the technique was weaker and weaker and thus was actually so weak compared to the predecessor it became a new one, lets consider this one a Rinnesharingan, but as we know, somewhere had to be the moment, which leaded to manifestation of the new technique, so if we would step back (merge the pathes that did split) we would acquire the technique, so basically, any eye, just a little bit related to the origin can be rinnegan and thus even Narutos current eye potentionaly could handle rinnegan, which it didnt. Anyway, any time you merge the pathes that have split, you will gain its predecessors power.
Edit: As I have discussed with my friend, I want to notice Im not saying that your surely will get the exact eye, this is still a new eye and a new evolution, so the eye will be different, but most likely the changes are gonna be sooo unnoticable, that you can consider it a fully flaged predecessor