From source (23 December 2017):

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AN IMPORTANT FOOTNOTE: I've had a few people ask if this is to do with the recent leaks. I haven't read any of them, nor do I plan to, so any similarity is purely coincidental!
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To be fair to them, it'd be an easy mistake! =P

Well, it was probably inevitable that Sunburst's Parents would turn up sooner or later. Don't worry, they're not becoming the new Octavia's parents though. This is all I have planned for them at the minute.

MLP:FiM owned by Hasbro.

Derpibooru description (23 December 2017):

Just as a small footnote (Mainly for mods) I had this tagged as ‘spoiler:s08’ by a background pony.

I’ve removed that tag myself. I’ve not read any of the recent leaks, nor do I plan to. So any similarity to anything that may have possibly leaked for s08 is purely coincidental and not intentional. :)