EDIT: Sorry, a redundant post about rumor engines that I thought hadn't been mentioned. As always @Imrahil is on it.
With the reveal of the new Tyranid the longest still standing Rumour Engine of 2021 has been solved. 26 January: Grrr, Imrahil
I am catching up on the Rumour solutions from the past months: This reveal solved two Rumour Engines: 16 February: 23 February: Grrr, Imrahil
These two rumour engines seem to be solved in the new pictures of the Slaves to Darkness book Grrr, Imrahil
This one is also said to be featured in the new Slaves to Darkness image, as the tail of the same centaur. A bit to shady to make out for sure though Grrr, Imrahil
Todays reveals ring some Rumour Engines as well (of course) First of the Sylvaneth flyers: They fit this Rumour Engine: 2 November: Grrr, Imrahil
And then the new Vampire Hero Cado Ezechiar: He solves two Rumour Engines: 14 September: 21 September: Grrr, Imrahil
The Centaur Gladiator solves a few Rumour Engines as expected: 23 February: 9 March: 30 March: Grrr, Imrahil
Finaly again a Rumour Engine of 2021 is revealed These Space dwarfs solve Rumour Engine below 1 June: Grrr, Imrahil