We use nCTEQ nPDFs with uncertainties to identify measurements which
have a potential impact on nuclear corrections and flavor
differentiation.  As the proton flavor determination is dependent on
nuclear corrections, this information can also help improve proton
PDFs.  In particular, recent LHC W/Z vector boson production data in
proton-lead and lead-lead collisions are quite sensitive to heavier
flavors (especially the strange PDF). This complements the information
from neutrino-DIS data.  We also survey upcoming future facilities
such as EIC, LHeC, and LHC upgrades and use a new tool, PDFSense, to
estimate the impact.