If I remember correctly, it is explicitly referred during the time Dream is held captive by the Burgess family. It is explained that the universe tries to make up for Dreams absence and a guy sees nightmares that cease only when he starts wearing a gas mask and fighting crime. This is the pulp version of the Sandman, so yes, He is part of the Gaiman lore.
Sounds good to me:
The above-mentioned politicians believe that after the “elimination” of Russian President Vladimir Putin, the Russians will elect the Constituent Assembly, which will create the “State Council”. The latter will, in particular:
conclude a peace agreement with Ukraine recognising its territory within the borders of 1991; justly compensate Ukraine for the damage that the country suffered as a result of the war. Afterwards, it will take Russia along the way that the country had already traveled before, during Boris Yeltsin’s presidency. Russia will then be integrated into Euro-Atlantic institutions, whereas Russian regions will be decentralised.