The mankini doesn't always do it for me, but I don't judge your tastes.
In the dream I had, it turns out that my mother was alive and had been in the quantum realm for the past thirty years. Not only had she been there, but she'd kind of evolved in a sense - gained extra powers as a result of her stay? The reason we found her was because of quantum entanglement - she'd put a message in Scott's mind when he was originally there, and when we opened a tunnel to the quantum realm for a hot second, she and Scott were connected and he received the message.
I mean, Stephen was in the quantum realm too. What if we opened a tunnel now, it'd be like tuning in to a new frequency - he might have picked up something that could help us. And besides that, if at any point you're moving through the quantum realm you're moving through time - if we open a tunnel to it, there also opens the possibility of time travel.