  The potentially realizable beam power at the Fermilab long-baseline neutrino
program has motivated a reinvigorated design and optimization effort for a
rapid-cycling synchrotron (RCS) intensity upgrade of the Fermilab proton
complex. We examine areas of technological development with the potential for
high-impact on the Fermilab RCS design - low-loss slip-stacking, advanced
neutrino-target R\&D, laser-stripping H$^{-}$ injection, fast-ramping
super-ferric magnets, nonlinear integrable optics, electron lens devices, and
next-generation halo monitors. A brief overview is given on the Fermilab
Accelerator Science \& Technology (FAST) facility, where the latter three
technologies will undergo comprehensive beam tests.
