If it had Pixar level marketing I'd say it had a chance of doing well (but not Pixar well). The marketing seems to be pretty minimal so I think a lot of potential audience won't even know it exists. If Sony is confident in the movie being appealing perhaps they are hoping for a viral / word of mouth campaign that makes the movie a sleeper hit. Unfortunately Captain America is being talked about as the greatest Superhero movie of all time, if that's the case then it's going to suck the air out of the box office for weeks, and R&C may just get lost in the noise.
I will go see it at the cinema if it gets a Rotten Tomatoes score above 50%.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix