Fans of the Transformers universe already can tell that Michael Bay and the rest of the crew behind Transformers: The Last Knight have dug deep into the Transformers lore for this one.
That being said, fans of Transformers will instantly recognize the name Onslaught and realize that some bad things are coming to the Transformers universe.
The presence of Onslaught seemingly confirms that the next Transformers movie will introduce the Combaticons.
It’s a fairly unassuming tweet, and definitely one hinting at all of the chaos and destruction that we have come to know from the series.