I'm not hopeful. The problem is experimental data from experiments where quantum gravitational effects are relevant. None of our particle colliders are big enough to generate the energies needed to do these types of experiments.

Without the funding to build much larger particle collider, I don't know of any other way to collect the necessary experimental data we would need.

Interesting
Do you think we could get an answer for this in next few decades? 

Imyourfed

science

What's the most important question in science that remains unanswered?

How to describe gravity with a single theory that gives repeatable predictions, that is consistent with both general relativity and with quantum mechanics. This to me is the biggest unanswered physics problem of our age, and whoever answers it will be on a par with Einstein.