I absolutely agree that more follow-up images would be great, and of course I'm no expert. But this Hubble image
seems to show something similar to spacenuut's image. (Red Shift, thanks for that link -- I had no idea!)
The bright star that's in the centre of spacenuut's image, very close to the top, seems to be at the bottom of the Hubble image, and seems to show the same orientation to 3115's disk. And the other star/supernova/what-have-you appears to be there too.
In spacenuut's image, the bright star at the top, the galaxy core and the mystery object are oriented like a clock showing 5pm. I think
I see the same orientation, though upside-down, in the Hubble image. You can zoom out and it becomes a bit more apparent.