I'm not sure how you arrived at that conclusion given the available evidence we have of Putin's many speeches and writings on the matter. And one is not mutually exclusive of the other.
His intentions have been obvious for a very long time for anyone who wants to see them.
The recent Tucker Carlson interview confirmed that Putin has an uncontrollable obsession with a made up version of history, and he gets visibly upset when his long rants about Ukrainian statehood being an anti-Russian conspiracy by the Austrian General Staff and the Pope get interrupted. Nazis running Ukraine is only a small part of that persecution complex.
Putin's speeches deserve as serious consideration as Hitler's. Until tanks started rolling, his speeches were also dismissed as rhetoric.