Some parents nowadays have the big dilemma of having two young kids and one normal (i.e. not a van) car. The problem is when you have to put two car seats in your normal car. You will fit them fine but the middle seat would become useless for any normal-sized adult.
Create an option of two car seats that will fit in a way that will allow for a third passenger on the second-row seat. These car seats have to follow the security standards (of course) of other car seats. They also need to be useful for the different age stages of a kid (i.e. convertible).
I believe Evenflo has revenues of $300M selling car seats and strollers. Maybe expect a $10M company with only this product?