I've recently been reading a book on building the Panama Canal. Before the Americans got involved (simplifying greatly!) there was an attempt to persuade Russia to buy the French partially-built canal. The book contains the wonderful line:

"What the consequences might have been had the Russian scheme gone any further is interesting to speculate on."

Yes ... the Panama Canal under Russian control during the Cold War, for instance. 'Interesting' is certainly the word I would use.