There are forces of progress and forces that retard progress, and often a battle thought won requires that citizens return to the ring to fight the battle all over again.
Black citizens risked their lives in racist places like Mississippi asserting their right to vote. Then, a couple of racist morons invert those brave efforts by using gerrymandering and I.D. card laws to take that vote away.
Women marched for decades, won battles for reproductive rights, and then a few misogynistic outfits push false stories about Planned Parenthood or charge up spiritually-regressive bases to oppose abortion under ANY condition and the battles thought won (even by Supreme Court decisions like "Roe versus Wade") end up nullified.
The same is apt to apply to the pipeline. While this particular one may not come to fruition, at the same moment when environmentalists are celebrating what SHOULD be an earnest and well-won victory, the elites are using their puppet politicians to sign into law, the worst possible trade agreements. These will essentially nullify any nation's right to oppose what corporations--and that includes Big Oil and Big Fracking--intend to do.
This Investor State Dispute clause that guarantees profits to any corporation that can prove that environmental law blocks its right to that all-important goal essentially grants corporations an unchallenged right to plunder. Like the feudal period's "Divine Right of King," today's crooked lawyers have invented a "Divine Right of Corporation" clause and built the entire bogus TPP and TIPP around it!
In other words, victory may be sweet... but unfortunately, in this era where primacy has been claimed by Mammon (those who love money in vast sums) and Mars (those who use, or identify with militarism) ... justice is not on the menu. The battle to preserve the already strained natural world is not won... it will remain ongoing.