Comet 67P Churyumov-Gerasimenko will be close to the Leo Triplet from around 4-8 April. The image shows the fields of view of T20/12/14 (large rectangle), T5/11 (medium rectangle) and T31 (square). All the others FOV's are too small for a reasonable composition. Click to embiggen.
This will be a challenging image to take as comet 67P will be around magnitude 16 at this time, but it is quite historic so worth the effort. The comet is moving slowly so that deep tracking on the comet will not smear the galaxies too much.
A tip of the hat to Stuart Atkinson for alerting me to this.
0067P 2015 08 13.0843 1.243263 0.640872 12.7960 50.1355 7.0402 20150806 11.0 4.0 67P/Churyumov-Gerasimenko