They both have songs titled Tunnel of Love, plus Nils Lofgren played with Dire Straits. Another lose connection, Mark has a song titled Radio City Serenade, Bruce has New York City Serenade. Bruce recorded his album The River at the Power Station in New York, finishing on 9th May 1980, Dire Straits started recoding Making Movies on 20th June, so they could have met around that time, and as Roy Bitten is on Making Movies, it seem even more likely.