Hi, I love what you got going on, and I was hoping that you could make it easier for us to transfer our characters to roll20 vault so we can create and use other places. I have bought stuff from your marketplace and i would like to use it on their games. Any chance that can be done? 

I doubt this will happen.

D&D Beyond are looking at making a VTT of their own so they may not be interesting in helping you use a different one.

In any case, if you use Firefox or Chrome there is an extension called Beyond20. Basically you can have Roll20 open in one tab and your D&D Beyond character sheet in the other. With the extension you'll be able to click on things in the character sheet to have it be rolled or displayed in the Roll20. So, with this, you don't need a Roll20 character sheet - want to detail what your racial feature does? Click it and it will show in the Roll20 window. Want to make a Persuasion check? Just click the Persuasion skill and it will be rolled in Roll20 for you.

You can find more info on the extension here: https://beyond20.here-for-more.info/