All we've got waiting for us is the slow, but enetiveable heat death of the universe as it approaches maximum entropy, and the space of time life can reasonably exist in the universe is around 100 Trillion years.
100 billion years from now. the local group will destabilize, merging into one big galaxy, a trillion years after that galaxies will be red shifted far enough we wont be able to see them anymore (even the gamma rays they emit will have a wavelength longer then the observable universe.) 100 trillion years from now, the Stelliferous era will end, and no more stars will form. 10-20 trillion years after that the last stars (low mass red dwarfs.) will exaust the last of their fuel, cooling to white dwarfs, leaving the universe populated black holes, neutron stars and white dwarfs. In the absence of an energy source, these remnants will cool further, grow faint and except for rare events the last light in the universe will go out.
Over the next quadrillion years, the remaining orbits of the planets will decay, or be flung from the system, and over the next 100 Quintillion years the same will happen to the stellar remnants within the galaxies.
10 Decillion years later baryonic matter (Which includes protons and neutrons.) will begin to decay into photons and leptons, and by 10 Duodecillion years (10^40) this will have finished, leaving the universe to the black holes for the next 10^100 years as they slowly evaporate to nothing, leaving the universe effectively empty as it reaches true heat death.
