I'd prefer a 150lb one! Suzuki RG500s were about that weight... Yes naming the engine Supermono and having previously had a famous Ducati bike called Supermono -which of course used a mono cylinder motor- makes it an obvious conclusion.
The chances are high they will release two different mono cylinder bikes, considering how much they praise their new Quadro Mono engine. I wish they would do something like the bike above but with the Supersport/ Hypermotard 950 engine.