It sounds like they're talking about Bumblebee. This was posted in 2016 so I don't think it's of any significance.
It's in reference to Sir Anthony Hopkins. This was tweeted a day before he was announced to be a part of the movie. The tweet calls him a knight because he was knighted in 1993 by the Queen, and he has received a golden globe award which is why the tweet says that he already has "an armor of gold."
I dunno man... GOLD knight? Who could they even be talking about? I don't even remember seeing a gold knight in the movie. Hmmmm, maybe a cut character? Maybe it's something hidden in the film itself? Gold.. knight? I dunno I- Yellow isn't gold you fools..! Surely not, surely it must be something less obvious. We need to get those Transformers movie theorists on this, stat.
I'd agree with the interpretation it's referring to Hopkins a Knight and a Golden Globe winner. Duloc's newest knight has a hide of green skin...
I remember everyone thought this was some sort of big cryptic hint at the time. In hindsight...I think it's just a cute reference to Bumblebee that plays off the title, which was revealed around that time. They're probably using "newest" to mean "youngest". They're basically saying he doesn't need a suit of golden armor because he already has one (because gold is basically shiny yellow). I don't think it was a reference to something or someone that was cut from the movie. I don't even think Bumblebee was supposed to literally have gold armor. I think it was just a cute (and slightly forced) joke from whoever ran the page.
This thread has given me two explanations and both annoy me immensely. TLK was such a fucking disaster even looking back at the promo material is frustrating. They had no clue what they were doing.
Bumblebee being the golden knight makes no sense because hes not gold and hes not a knight he just had a hammer and thats it That makes sense
The problem with it referring to Hopkins is that he was already announced almost two weeks before that Tweet was made, so it's not a teaser, it's just a weird reference to him without context or meaning.
The tweet was posted on June 2nd 2016, which was a day before Anthony Hopkins was announced to be in the movie.