There's no content underneath the "What Now" heading on the Thank You page after purchasing a standalone Premium theme.
To be led to a Thank You page that contains some useful links to next steps. This expectation is based on how the Thank You page appears after purchasing a domain or a paid plan.
The Thank You page had a "What Now" heading but there was no content underneath it.
Chrome 57.0.2987.133 / MacOS Sierra 10.12.3

I took a look at this one, but I'm having a hard time reproducing. I can't seem to find a Premium theme available on wordpress.com/start/themes during signup. I believe these are the themes that should be displaying, and it looks like they're all free.
Siobhan, do you happen to remember which theme you purchased to trigger this?
@jeremeylduvall: Sorry, my steps to replicate were actually wrong. The correct steps are:
It can also be replicated by purchasing a Premium theme on an existing free or Personal site. You'll need to actually make payment for the theme to replicate, using credits doesn't seem to produce the same effect.
Awesome - thank you! I think I was missing this:
using credits doesn't seem to produce the same effect.
I'll take a peek next week!
I'm having trouble reproducing this one either from the /themes flow or purchasing a theme on an existing site. Note that I'm not using credits, but am using a test card. @SiobhyB or @jeremeylduvall are you still seeing this issue?
Here's what I see on the new user flow, starting from /themes logged out.

Going to close this one out since I suspect we completely redid the thank you page. Feel free to reopen if this is not the case.
@gwwar: Sorry for the delay getting back to you! I can confirm that I'm no longer able to replicate. Thanks for looking.
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Awesome - thank you! I think I was missing this:
I'll take a peek next week!