Sorry, my security antenna's twitched at this suggestion. I can't say that it sounds like a good approach.
Generally cross-domain data embeds need to be at least treated with great caution. What might happen if you made a mistake in the code or someone hacked your site? Could end up having a significant impact on Discourse.
I've not looked at Discourse add-ins and what they can/can't do but I think that needs to be the starting point, not hacking one site into another. Resource use on Discourse might also need to be taken into account as I know that we already push the limits.
