It all depends on what you mean by 'later on'. On a timescale of tens of thousands of years, yes, it is quite likely that the planet will cool from time to time because of its orbital variations around the sun. Orbital changes, and other factors, trigger ice ages and technically, we are experiencing a warm 'interglacial' at present. In the short term (hundreds of years), natural climate-controlling mechanisms are being so swamped by pollution from fossil fuel burning that a continuing rise in temperature is inevitable.
It all depends on what you mean by 'later on'. On a timescale of tens of thousands of years, yes, it is quite likely that the planet will cool from time to time because of its orbital variations around the sun. Orbital changes, and other factors, trigger ice ages and technically, we are experiencing a warm 'interglacial' at present. In the short term (hundreds of years), natural climate-controlling mechanisms are being so swamped by pollution from fossil fuel burning that a continuing rise in temperature is inevitable.