During one of EA's investor calls, Blake J. Jorgenson, EA's CFO and Executive Vice President, said "I'm sure that there will be future Titanfalls at some point that may be on multiple product platforms." This matches what the developer's have said on Twitter about future games being on the PlayStation 4.
There is still no chance of the first Titanfall coming out on the PlayStation 4, but it's nice to hear that Sony's console will be considered in the future. Of course, you'll have to wait a year or two, but better late than never I suppose.
EA talks multiplatform Titanfall sequels [Eurogamer]