The provided sources overwhelmingly confirm the truthfulness of the statement. Multiple high-authority news outlets, including the Financial Times, The New York Times, Reuters, and Politico, report that the Russian Central Bank has already filed a lawsuit against Euroclear concerning its frozen assets. The act of filing the lawsuit is the strongest possible evidence that a plan to do so existed and has been executed. Several sources further corroborate the 'planning' aspect by referencing prior warnings and official statements from Russian officials, particularly Central Bank head Elvira Nabiullina, indicating that this legal action was a premeditated response. The evidence is consistent across all provided sources, with no contradictions. The statement is not only true but is an understatement, as the plans have already materialized into concrete legal action.